Albert blauvelt



3 Sheets-Sheet 1..

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A.-BLAUVELT.

EXGAVATING BUCKET 0R GRAB. No. 417,975. Patented Dec. 24, 1889.

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(No Model.) 3 Sheets-Sheet 2.

A. BLAUVELT.-

EXGAVATING BUCKET-0R GRAB.

' No. 417,975. Patented Dec. 24, 1889.

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EXGAVATING BUCKET 0R GRAB.

Patented Dec. 24, 1889-.

v INVENTOR WITNESSES:

UNITED STATES,

PATENT OFFICE.

ALBERT'BLAUVELT, OF NEW YORK, N. Y.

EXCAVATING BUCKET OR GRAB.

SPECIFICATION forming part of Letters Patent No. 41 7,97 5, datedDecember 24, 1889.

Application filed March 5, 1889- Serial No. 301,927. (No model.)

To all whom it may concern.-

Be it known that I, ALBERT BLAUVELT, a citizen of the United States, anda resident of 229 Broadway, New York city, New York, have inventedcertain new and useful Improvements in Excavating Buckets or Grabs, ofwhich the fellowing is a specification.

My invention relates to improvements in excavating buckets or grabs suchas are called clam-shells;. and the object of my invention is to makesuch buckets or grabs more compact and powerful than allied priorinventions.

In my invention, also, the periphery of the main drum comes at or nearthe center of the bucket, giving the hoist-chain an exactly or nearlycentral lift, and dispenses with the need for a great deflection of thehoist-chain to the center, as required in the common clam-shell bucket.By reason of the halves of my bucket being hinged on axes laterallyremoved from each other I secure an oblique and lateral scooping actionof the cutting edges or points of my bucket or grab such as is notobtainable by buckets as commonly constructed with halves or sectionshinged at or near the center of the bucket.

I attain these objects by the mechanism shown in the accompanyingdrawings, in which- Figure 1 is a side elevation of myinvention in theform of a clam-shell bucket when closed. Fig. 2 is a view of the same,showing the bucket when open. Fig. 3 is a side elevation of my inventionas a toothed grab when closed. Fig. 4 is a view of the same when open.Fig. 5 is a plan view of Fig. 1. Fig. 6 is a plan View of Fig. 3.

Similar letters refer to similar parts throughout the drawings.

The frame A carries and holds in fixed relative position the axes X, Y,and Z. The axis X has secured to it a drum E and pinions D. The axis Ycarries ordinary or external gear-segments B and one side or half of thebucket secured thereto. The axis Z The segments 13 and C have the samepitch diameter, and

their arcs of movement clear and pass each other laterally. (See Figs. 5and 6.) The pinions D have the same pitch diameter and take each segmentseparately or have sufficient breadth to take two segments side by side.segments and the respective halves of the bucket or grab in opposite andequal arcs of movement. The bucket is closed by hoisting on the chain F,which Winds around the drum E, secured on the axis of the pinions. Theopening of the bucket is effected by slacking the chain F and holding orhoisting the chain G. This, by reason of the connections I I beingattached to points overspanning the axes and the center of gravity,permits the bucket or grab to open by gravity precisely as is usual inallied types of buckets or grabs.

H is a counter-weight to make the bucket or grab hang level on thechains and to render the opening movement more positive. I can apply myinvention to construct a bucket with both halves and segments carried bya common axis central with the bucket; but this necessitates differentpitch diameters for the segments and corrective differences of diameterson the pinions which I think best to avoid in construction.

I prefer to avoid cast-iron in the construction of my invention and tomake all parts thereof of wrought metal or cast-steel.

Having described and shown my invention, that which I claim aspatentable, and desire to secure by United States Letters Patent, is

1. A bucket or grab having an external or spur gear-segment and aninternal gear-segment, each gearing into pinions having a common axis,said axis also carrying a drum or sheave.

2. In a bucket or grab having a hoist-chain winding about a drum orsheave, the parallel axes X, Y, and Z forming a triangle having its apexremoved to either side of the center of the bucket or grab, as shown.

3. The combination, with the bucket or grab having sections or sides anda frame to which the sections are hinged, of toothed segmentspermanently connected to the sections,

Rotation of the pinions D rotates the a pinion or pinions for acting onsuch segmy invention Ihave signed my name, in presments, and a drum orsheave and rope or ence of two Witnesses, this 1st day of March, chainfor rotating the pinion or pinions to 1889.

close the bucket or grab, and the links for ALBERT BLAUVELT.

opening the bucket or grab, substantially as Witnesses:- shown. M. F.CAHILL, In testimony that I claim the foregoing as J NO. A. OULD.

